Suppressing nuisance alarms of a floating production, storage and offloading (fpso) surveillance system
AssigneeShell Oil Company
InventorsOlumuyiwa Johnson SANYA, William Richard BYRNE
Life of this patent
Estimating the term…
Abstract
A Floating Production, Storage and Offloading (FPSO) surveillance system (7) is equipped with an adjustable alarm threshold that suppresses nuisance alarms if liquid level variations in FPSO crude oil and/or other liquid storage tanks (6) monitored by the system do not exceed estimated oscillating liquid level variations due to oscillating motions of the FPSO unit (1) during severe weather conditions.
Claims11
A method for suppressing nuisance alarms of a Floating Production, Storage and Offloading (FPSO) surveillance system due to oscillating liquid level variations in a FPSO storage tank during severe weather conditions, the method comprising:
- providing the FPSO surveillance system with a FPSO storage tank level gauge with an adjustable alarm threshold;
- and
- inducing the FPSO surveillance system to:
- monitor oscillating motions of the FPSO unit during severe weather conditions;
- estimate oscillating liquid level variations in the FPSO storage tank due to the monitored oscillating motions of the FPSO;
- and
- adjusting the adjustable alarm threshold to suppress nuisance alarms of the FPSO surveillance system if liquid level variations in the FPSO storage tank monitored by the FPSO storage tank level gauge do not exceed the estimated oscillating liquid level variations due to the monitored oscillating motions of the FPSO unit.
A Floating Production, Storage and Offloading (FPSO) surveillance system comprising:
- an oscillating motion monitoring system for monitoring oscillating motions of the FPSO unit during severe weather conditions;
- means for estimating liquid level variations in the FPSO storage tank due to the monitored oscillating motions of the FPSO unit;
- and
- a FPSO storage tank level gauge with an adjustable alarm threshold, which is configured to suppress nuisance alarms of the FPSO surveillance system monitoring system if the liquid level variations monitored by the FPSO level gauge do not exceed the estimated oscillating liquid level variations due to the monitored oscillating motions of the FPSO unit.
Dependencies are inferred from the claim text.